Roemer, John E
Institute of International Studies, University of California, 1975
Buku Teks
edited by Walter Sterling Surrey and Crawford Shaw
American Law Institute, 1963
Buku Teks
Gup, Benton E., author
John Wiley , 1979
Buku Teks
Eko Priyo Pratomo, author
Gramedia Pustaka Utama, 2001
Buku Teks
Mauldin, John, author
John Wiley & Sons, 2004
Buku Teks